Boat-propeller.



H. W. GRAY.. BOAT PROPE'LLER.

APPLICATION FILED 061120) 1916.

Patnted Feb.19,1918.

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BOAT PROPELLER.

APPLICATION FILED OCT-10.1916.

Patented Feb. 19, 1918.

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' H. W. GRAY.

BOAT PROPELL'ER.

APPLICATION FILED 0cT.10.1s|6.

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HAYWGOD WASHINGTGN GRAY, 01 ABEL, GEORGIA.

BOAT-PEOPELLER.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed. October 16, 1816. Serial No. 124,845.

To (ZZZ/whom it may concern:

Be it known that l, HAY-Noon l/V. GRAY, a citizen of the United Fitates, residing at Adel, in the county of Berrien and State of Georgia, have invented certain new and useful linprovements in l loatlropellers; and I do hereby declare the following to be a full, clear, and exact doscriptionof the invention, such. will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, a, n d to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in boat propellers adapted to be attached to the stern or side of the boat and so constructed as to be reversible.

The invention consists of a simple and ef ficient apparatus of this nature, having various details of construction, combinations and arrangements of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claims.

My invention is illustr ted in the accom panying drawings, in which Figure 1 is a top plan view of the pro-- peller showing the parts in dotted lines in different positions.

Fig. 2 is a vertical sectional view on line 22 of Fig. 1.

Fig. 3 is a sectional view on line of Fig. 1.

Fig. lis an enlarged part of the invention.

Fig. 5 is a detail plan view showing the parts illustrated in Fig. 4, in different relative positions.

Reference now detail plan view of a being had to the details of the drawings by numerals, 1 designates the frame of the apparatus waich may be of any size or shape and so arranged that it may be lowered into the water or raised therefrom and held at different positions. Mom ited to have reciprocating movements in open ings 2 in the cross-piece 3 of the frame are the beams l, 5, 6 and 7, the rear ends of the beams 41- and 7 being pivotally connected to,

the outer ends of the levers 8 which are slotted at 9 and their inner ends are pivotally connected to the pivots 10, which latter are carried by a cross-piece 11 which is fastened to corresponding ends of the beams 5 and 6. A pitinan, designated by numeral 12, is adapted to be pivotally connected to the cross-piece 11 and is reciprocated by any suitable power mechanism, not shown. The ends of said beams have attached thereto respectively the racks 18, l l, 15 and 16, each of which is provided with axially rocking shafts 17 and 17* mounted in apertures in the top and bottom portions of the racks, the upper ends of the shafts projecting above the upper ends of the racks for a purpose which will be presently described. Each of said shafts has a propelling blade 18 secured thereto which is designed to feather when being moved through the water in one direction. All of the racks have similarly constructed blades andit will be noted that the two racks l3 and 16 move forward or backward together, while the other racks 14 and 15 move together in a direction opposite from the move ments of the racks 13 and 16.

Mounted upon said frame is a longitud inally movable bar 19, having angular grooves 20 formed in one face thereof which receive the angular projections 21 upon the brackets 22, and serve as means to guide the bar 19 as it is moved longitudinally. Cam members, designated respectively by numerals 23 and 2 1 project from the bar 19 in pairs, there being two of said cam members and each rack carrying two blades. Opposite each pair of cam members 23 and 24-. are reversely arranged cam projections 25 and 2' which are fastened to a bar 27, grooved on its outer face, at 28, to receive the angular projections 29 upon the arms 30 which are so cured to the frame.

It will be noted upon. reference to the drawings that each shaft 17 in the various racks is provided with an angled crank. pin 31 which has pivotal connection with a plate 32, and 33 designates a similar crank pin which is fastened to the shaft 17 and is pivotally connected also to the plate 32. A pin 34 projects from each rack and is adapted to engage one or another of the notches 3 9 formed in the edge of a plate 32 and serving to hold the plate in place while the apparatus is in operation.

In order to impart a longitudinal movement to the two bars 19 and 27 a rock shaft 35 is journaled upon the frame and has links 36 pivotally connecting the same, one with each of said bars, and 38 is a handle fixed to the rock shaft and forming means for rocking the same accordingly as it may be desired to cause the apparatus to propel a boat forward or backward, the said rock shaft and longitudinally movable bars with attachments forming a reverse mechanisnn In operation, the apparatu being lowered into the water, either at the stern or at one side or another of the boat, it may be held at different elevations so that the blades will dip partially or wholly within the water, it being understood that, when the blades are immersed to the r farthest extent, the maximum power may be obtained. As the pit-man causes the beams to reciprocate, the intermediate beams 5 and 6 will move in a direction opposite to the movements of the beams 4; and 7. Assuming that the apparatus is adjusted to propel the boat forward, the propeller blades carried by the two reeks l4: and 15, which, at the mtment the apparatus begins to operate, are at their farthest forward limits, will be po itioned broads de to the water against which they are to be pushed as the shafts 5 and 6 are moved longitudinally toward the rear of the apparatus. When the two racks 14 and 15 approach their farthest rearward l mit, a crank pin 17 carried b a shaft 17 will come against the curved edqe of the cam projection 23 and cause the blades to. feather on their return forward mo ements, the two blades being caused to turn in unison through the medium of the plates 32. As the two racks upon the beams 5 and 6 move rearward, the other racks l3 and 16 upon the beams 4 and 7 respect ely will move forward, the blades carried by the racks 13 and 16 feathering while the blades on the intermediate racks are being forced rearward and vice versa. lVhen it is desired to reverse the propelling apparatus, the operator by causing the shaft 35 to rock may throw the bars 27 and 19 in proper position so that, when he crank pins 17 upon the shaft '17 come in contact with the curved edges of the cam projections 24, the propelling blades w ll operate in a reverse manner to their mo ei e ts when in positions to propel be cra ft f rward.

lVbat I cla m to e new is 1. In a hydraulic propelling apparatus for boats comprising a frame. reciprocating beams mounted there n, a rack fixed to each beam, a rock shaft journaled in each rack, a blade upon each rockshaft, movable roversing bars, cam projections thereon, a crank pin carried by each rock shaft and adapted to contact with a cam projection, and connec ions between the shafts.

2, Inv a hydraulic propelling apparatus for boats compr sing a frame, reciprocating beams mounted therein, a rack fixed to each beam, a plurality of rock shafts journaled in each rack. a blade upon each rock shaft, movable reversing bars, cam projections thereon, a crank pin carried by each rock shaft and adapted to contact with a cam projection, plates pivotally connecting the rock shafts .of each rack to cause the same to rock together.

3. In a hydraulic propelling apparatus for boats compris'ng a frame, reciprocating beams mounted therein, a rack fixed to each beam, a plurality ofrock shafts journaled in each rack, a blade upon each rock shaft, longitudinally movable bars, each having a groove in the face thereof, mean upon the frame engaging said grooves, cam projections upon the bars, crank pins fixed one to each rock shaft, pivotal connections between the rock shafts of each rack to cause the same to rock together, and means for I crank pins fixed one to each rock shaft,

pivotal connectionsbetween the rock shafts of each rack to cause the same to rock together, a rock shaft j ournaled in the frame and having pivotal link connections with said movable bars.

5. In a hydraulic. propell ng apparatus for boats comprising a frame. reciprocating beams mounted therein, a rack fixed to each beam, a plurality of rock shafts journaled in each rack, a blade upon each rock shaft, movable reversing bars, cam projections thereon, crank pins secured to said rock shafts. a plate having pivotal connect'ons with the rock shafts in each rack, notches upon the edge of said plate, a pin projecting from each rack adapted to engage said notches, and means for moving the reversing bars.

6. In a hydraulic propelling apparatus for boats compris ng a frame, racks and longitudinal beams secured thereto, propelling blades carried by the racks, a crossp ece connecting th intermediate of said beams, levers pivoted upon the frame and at the r outer ends to the outermost of the side beams and the inner ends of said levers pivotally connected to said cross-piece, a pitman pivotally connected to the cross-piece, and means for feathering the blades when moving in one direction. x

In testimony whereof I hereunto afix my signature in presence of two witnesses.

HAYWOOD WASHINGTON GRAY. Witnesses M. F. SHARPE, H. J. PAR-RISE.

Copies of this patent may he obtained for five cents each. by addressing the Commissioner of Patents,

Washington, D. C.

a frame, reciprocating 

